Again, dont use a thick deck for LV3 farming. It is a waste of time.
For farming Lv.3 easily, try this
12 Aether Pillar
6 Dimensional Shield
3 Immortal/Parallel universe
6 Phase Dragon
3 Lightning
It can also farm lv5
There are much more decks available in the forum for Lv3 farming, they are probably better then the above one.
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For the deck u posted, it is probably trying to get out creatures from different elemnt to kill the enemy.
Most rainbow FG-killer uses the FFQ-Oty-Druid combo, you can copy SG's deck for LV5 and false god killing
http://elementscommunity.org/forum/index.php/topic,1615.0.htmlOr if you dont want it
you may try:
-3 Bond
-3 quantum pillar
-1 mummy
-1 parasite
-all minor vampire
-1 mind flayer
-1 mummy
-1 reverse time
+2or3 graboid
+1 fire golem
+2 werewolf
+2 hourglass
The deck may not be very good after the above changes, but i am sure it can be improved a bit
If you want great improvement, dont feel ashamed to copy the decks on the forums. They rocks.